A second article on the official website informs about the changes made to the classes following patch 5.2 (which you can find in full here). We learn more about 3 classes: mage, paladin and priest.
- Improved Frost Specialization in PvP
- changed the PvP set bonus with reduced Counterspell cooldown only if successful
- Spiritual Presence now only makes Ring of Frost instantaneous
- modified fire stroke glyph
- Changed Arcane specialization
- maximum accumulation of 4 Arcane Charges
- Scorch becomes a specialized fire mage spell
- New Talent: Flame Glow
- Changed Holy Specialization in PvP:
- Casting Time for Blinding Light
- changed the PvP set bonus that affects Lightning Bolt
- Revenge specialization changed in PvP:
- Decreased the cooldown of Avenging Wrath to 2 minutes
- Improved healing efficiency by better converting potency (PvP) to healing
- greatest benefit from Glyph of Blessed Life and Templar Verdict
- Hammer of Light slowing effect
- Modification of the protection specialization:
- Grand Crusader enjoys dodging and parrying
- Modification of the shadow specialization:
- reduction of healing produced by Phantasm and Psychic Demon
- reduced damage spikes with Glyph of Mental Spike
- Modification of the discipline specialization:
- Spirit Shell is no longer a mastery benefit
- Power Word cost reduction: Shield
- Divine Aegis now requires a Healing Prayer critical effect to activate and applies a bubble
- control affects healing and absorption
- Penance enhancement
- Modified discipline specialization in PvP:
- changed the PvP set bonus to reduce the cost of Quick Heal
- some spells that cannot be dispelled
The interventions are all argued and explained, so I invite you to read the entire article!